OK, here's a partial list of docs I've seen (
in order as listed)
6. No Logo: Brands, Globalization and Resistance
7. Exit through the Gift Shop
7. An Inconvenient Death
8. Bukowski: Born Into This
8+. Penn & Teller: Bulls**t lol
17. Hoop Dreams (Chi-cago!)
18. The Aristocrats
19. Cocaine Cowboys
20. Cocaine Cowboys 2
26. Fahrenheit 9/11
30. Ben Steins Flunked: No Intelligence Applied
30. H.H. Holmes: Americas First Serial Killer (The Devil in the White City [Chitown b**ches!])
34. Inside Job
35. Grizzly Man
42. Bowling for Columbine
43. Sicko
48. Super Size Me
53. Capitalism: A Love Story
59. Religulous
62. Shooting War: World War II Combat Cameramen (spoiler alert:
the most iconic picture of all was staged!)
64. The Future of Food*
65. Roger and Me
94. Who Killed the Electric Car?
222. The Corporation
297. When The Levees Broke
305. Wordplay
Notable OmitsN/A. Client 9: The Rise and Fall of Eliot Spitzer (2010)
N/A. The Warning (2009)

(IMO one of/
the most important docs of the past 5 years. You can watch the film in its entirety here)
http://www.pbs.org/wgbh/pages/frontline/warning/N/A. End of the Century (2003) re The Ramones (Surly I've seen more music docs...???)
*This one seems like it's something you'd like, swish. It is excellent!
The Future of Food (bummer, no longer available online

At least a 10:00 preview is provided here)
http://topdocumentaryfilms.com/the-future-of-food/